Question

af a+b+c=6 And ab + bc +ca=15, than a² + b²+c²=​

Answer 1

Answer:

6

Step-by-step explanation:

According to question

a+b+c=6

squaring on both sides

(a+b+c)^2=(6)^2

a^2+b^2+c^2+2ab+2bc+2ca=36

a^2+b^2+c^+2(ab+bc+ca)=36

a^2+b^2+c^2+2(15)=36{given above}

a^2+b^2+c^2=36-30=6

Answer 2

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